Tractor lister



July 157, i928. ,677,474

. W. S. GRAHAM v TRACTOR LIsTER Filed Feb. 6, 1924 2 Sheets-sheet l .QN eww M r NJN QW July 17, 1928.,

W. S. GRAHAM TRACTOR LISTER FiledFeb. es, 192'4` 2 sheets-sheet 2 4: #tra Th1/enga". ZUf/'Zzzam/ @f77 dhd77@ 10 plement.

'Parental July 17, 192s.

UNITED s TATEs PATENT OFFICE.

WILLIAM S. GRAIEAIMLt OF CANTON, ILLINOIS, ASSIGNOR TO INTERNATIONAAL HAR- 'VESTER--COM-PANY, 0F CHICAGO, ILLINOIS, .A CORPORATION OF NEW JERSEY.

'rmcron LIsrER.

Application led February 6, 1924. Serial No. 690,898.

This invention is direc-ted to improve-` ments in the construction of lister plows of the type usedin breaking ground for wheat, and the main object of the invention is to 6 provide an implement of simple `construction that can be converted from a two-row to a three-row machine and vice versa and that will, be adjustable to various widths whenl used as either a two or three-row im- In lister plowing with trac-tor power, the average small tractor is only capable of handling a' two-row machine when throwing up the ridges in the first instance, but

when relisting or brusting out the ridges previously thrown up by the two-plow machine, as practised in the wheat land country, three plow bottoms should be pulled as it is evident that the tractor, when working on land previously listed, must necessarily run with its wheels in the furrowsand must pull an odd number of plows or sweeps in order to properly engage the ridges. By substitution of special sweeps', three bottoms can be handled by the tractor when relisting, and, in view of the foregoing facts, the advantages residing in a.

convertible machine of the 'type herein disclosed become plainly ap arent. v

The above and other o jects'have accordingly been attained by the preferred embodiment of the invention hereinafter disclosedand claimed. j

Referring to the drawings accompanying the application,-

Fig. 1 is a plan view o f a machine embodying the invention showing the' threeplow arrangement and the special sweeps then employed;

Fig. 2 is a similar view showing the twoplcw arrangement employing lister bottoms; an v Fig. 3 is a side elevation. A

A machine constructed in accordance with' `straight and the forward flange depending vertically, and the rear The central members 12 'of the frame aresecured at the rear to the vertical flange of bar -11 andhpass over bar 10 to which they are fastened by means of brackets 13. The forward ends of bars 12 are spaced apart and braced on the bar 10 by braces 14., and the bolts securingy these braces to the ends of bars 12 serve also as pivotal'supports for a draft frame 15, the forward end of which is provided with the usual means for coupling to a tractor. The rear ends of the bars constituting the draft frame 15 extend just beneath thefront bar 10 as shown in Fig. 3. The effect of this arrangement is that the` draft frame' is free to pivot 'when the machine is in operation, but will engage beneath bar 10 when the frame is raised, thereby preventing backward tilting of the machine.

For combination with the ,frame construction above described there is provided a pair of similar outer plowing units and one central unit. The central'uni-t consists of a sweep 16 carried onan ordinary plow beam l17 secured at its rear end to thebar 11 and having the forward end of its beam bent laterally as at 17a and secured to the front bar 10.by bolts in certain of the perforations 10b. construction and therefore, only one of them will be describe Each comprises a plow vThe outer units are similar in bottom 18 which is preferably a sweep, as

shown in Fig. 1, vwhen a three-bottom arrangement -is in use, and a lister bottom, as shown in Fig.` 2, when usedV as a two-bottom arrangement. The bottom 18 is carried on a beam 19,- the rear portion of. which isl i ortion bent inwardly toward the center o the machine in a manner to offset the forward end ofthe beam, as at 19a. The straightrear portion of the beam 19 is selectively attachable in the perforations 11a of bar 11 and the forward offset end 19a thereof is similarly Vattachable in the perforations 10a of bar 10. A supplemental bar 20 connects the inwardly inclined portion of beam 19 with bar 11 and serves to strengthen the unit and brace the machine. On the rear portion of beam 19 and bar 20 there is journaled the horizontal portion of a forwardly inclined crank axle 2l. The forward end of this axle is bent inwardly as at 22 and has secured to ita bearing bracket 23 in which there is journaled -a wheel shaft 24 carrying the supporting wheel 25. The inner end of wheel shaft 24 is bent to form a crank 26 and the end of this crank is pivotedto a lifting link 27 (Fig. 3), the upper end of which is pivoted to a crank arm 28 on transverse shaft 29 also journaled onthe unit. A forwardly extending lever 30 is securedto the inner end of shaft 29 and has the usual latch mechanism cooperating with a toothed quadrant 31 secured on bar 20. By this arrangement lever serves to adjust the supporting wheel for depth of plowingand may be used.

to lift and lower the plows to and from'the ground, but, for this latter purpose, there is preferably provided power lift mechanism comprising the usual two-part intermittent 'clutch 32 carried on 'wheel' 25 and axle 24 and controlled by [tri 33 through actuation of Vtri lever 3,4 in t e manner well understood y those skilled inthe art, the mechanism/here employed 'being similar in all -essential res ects to'that disclosed inthe patent to Lin gren #1,440,924, January 2, 1923,

and, therefore, not described in further detail here. tension spring 35. connects an arm 36 on the inner end of the crank axle 21 with an abutment 37 preferably""formed by extension of the forward end of bar 2O inwardly from its oint of vattachment to the forward" end ofd amA 19, as clearly shown in Figs. 1 an 2.

It is to be noticed Athat each unit is self contained, the axle and wheel and adjusting mechanism therefor being carried on the beam and supplemental bar' .and all bein adjustable laterally together on bars 10 and 11. .When in position the pair of beams comprised in the outer units Aconverge lin; wardly, and this in connection with the long rear bar .and shorter front bar makes`the machine convertible, as there \will tbe no interference with `.the wheels by the front' bar when the units are set infor two rows as in Fig. 2. When it is desired to convert the any desired adjustment without interference In Aorder to assist the lift, the

from any of the frame members, the machine being in either case rigid when assembled and the control levers easily accessible to the driver of the tractor.

The above construction exemplifies a simple and preferred embodiment of the invention, but it will be understood that modifications thereof may be made within the scope of the appended claims.

What is claimed as new is:

1. A convertibley lister comprising the combination of front and rear transversely extending frame bars with the rear bar extendin be ond the front bar at each side, a centra y ocated plow carrying beam re- -movably secured tothe bars, and a plow carrying unit mounted between the respective outer portions of said bars and ad'ustable to selective positions towards and rom the middle thereof, each unit comprising 'a supporting wheel carried on a forwardly inclined crank axle adjustably journaled on the unit and located on -the outer side of tions of the bars, and a pair of plowing units adjustable ltransversely on the bars,

each unit comprising a plow carrying beam connected to the respective bars at its front and rear ends, said beams converging inwardly, and each unit comprising .a supporting wheel carried on a forwardly inclined crank axle adjustably journaled on the unit and located on the outer side of said beam and towards the forward end VIthereofl I i 3. convertible lister comprising the combination of yfront and rear transversely ex- ,tending frame bars, with the rear bar exgtended beyond the front bar at each side, fand a pair of plowing units "mounted on i'said bars for transverse adjustment, 'each mit comprising a plow carrying beam con- `-nected to the respective frame bars at. its front and rear ends, its forwardend bein los l mounted on each 'unit andl locatedtowardsy the forward end of theplow beam.

4. A convertible lister comprising the combination of a short front transversely extending frame bar, a lon` frame 'bar parallel to and spaced rearwar ,y of the front bar, a ,centrally located plow carryin member removably'secured to 'the bars, an `plow -carrying" members having 'inwardly bent forward ends. mounted between the respective outer portions of said bars and ad'ustable to selective positions towards them ddle thereof to make a two-row lister when he central plow carrying'- memberis removed.

5. A` convertible lister comprising the combination of front and rear transversely extending frame bars of unequal lengths, the front bar being the shorter, and a plurality of plowing units ,mounted on said bars for transverse adjustment, each unit comprising a supporting wheel and a plow carrying beam, each beam being secured to the respective frame bars at itsfront'and rear ends and the beams of the outer units being bent inwardly at their front ends.

6. Adister plow including frame members, a plurality of self 4contained lister plow units carried by the frame members, said units being connected to the frame members by transversely bent plow beams so as to render theXplow readily convertible from a three row lister to a twov row lister by removing the middle unit and moving the side units inwardly without changing the frame members.

7. A lister plow readily convertible from a three row lister to a two row lister, said plow including a plurality of self contained lister plow units, each of said sel3tl contained units having a transversely bent plow beam and a lift mechanism incorporated therewith. I

8. A lister so constructed as to be readily1 convertible from a three-row lister to a two row' lister comprising, in combination, a front transverse frame bar, a rear frame bar parallel to the front bar and extending 1 beyond the ends of the front bar at both sides of the lister, and wheeled lister plow units connecting the ends of the frame bars when the lister is used as a three-row machine, the units having inwardly bent plow `sitions toward. and

beams constituting the main frame connec. tions between the frame bars.

9. A lister so constructed as to be readily convertible from a three-row machine to a two-row machine comprising, in combination, a front transversely extending frameI bar, a rear frame bar parallel to the front bar and extending laterally beyond the front bar at each side of the machine, a plurality of plowing units rigidly connecting said frame bars, each of said units includingfa plow carryin beam rigidly connecting the frame bars, t e outer plowing units having their plow beams bent/inwardly of the listerso that these beams converge forwardly of the lister, and wheel supports for the outer plowing units.

10. A lister readily convertible from a three-row machine to a two-row machine comprising, in combination, a front transversely extending frame bar, a rear trans-- versely extending frame bar extending beyond the ends of the front bar at each side of the lister, and a lister plow carrying unit connecting the respective outer portions of said bars and adjustable to selective pofrom the longitudinal median line of the machine, each unit comprising a plow beam rigidly connected to the frame bars and constituting the only means of connecting the frame bars at the positions of the units, the plow beams being bent inwardly so that the rear ends of the beams may be secured to the ends of the rear frame bar and their front ends secured to the ends of the frontframe bar.

In testimony whereofl ax m s1 ature. WILLIAM S. GA 

